Hippocampus hudsonius, Lined Seahorse, FMNH no. 49126. Field Museum of Natural History, Chicago. The entire genus Hippocampus is listed in Appendix II of CITES, effective May 2004 and all Hippocampus species are listed as vulnerable or endangered on the IUCN Red List of species at risk. They are dried for traditional medicine and curios and caught live for aquarium or hobbyist use. The species is caught by shrimp trawling and by other fisheries, and is affected by loss of habitat due to coastal development and pollution. ..As biologists describe new species and add to our understanding of the interrelated nature of life on Earth, a species becomes extinct every 20 minutes (100 to 1000 times the background extinction rate as seen in the fossil record). Collections in natural history museums play important roles in conservation, education and research. Most of that work and the associated specimens are not on public display in museums? typically, less than five percent of specimens are exhibited.